Air-preheating device



Oct 13 l H. R- BRUNNER AIR PREHEATING DEVICE 2 Sheets-Sheet l Filed may 29. 1924A Patented Get. 13, 1925.

UNITED STATES PATENT oFFlc-E'f. f"

HERBERT R. BRUNNER, OF NEW YORK, N. Y., ASSIGNOR TO COMBUSTION SPECIALTIES y CORPORATION, LA CORPORATION OF DELAWARE.

AIR-PREHEATING DEVICE.

Application filed May 29,

To all whom t may concern: ,l

Be it known that I, HERBERT R. BRUNNER, a citizen of the United States, residing at NewV York, inlthe county of New York, State of New York, have invented a new and useful Air-Preheating Device, of which the following is a specification.

My invention relates to air preheating devices for combustion chambers. The object is to provide improved means for delivering heated air to the combustion chamber, to secure adequate preheating of the same and also to secure even and satisfactory distribution to the combustion space.

The invention is an improvement on the structure and arrangement described in my Patent N o. 1,433,601 dated Oct. 31, 1922, in that it secures a more positive and thorough heating of the air, as it passes through the device, and also secures a better distribw tion of the heated air to the combustion space.

Referring to the drawings which illustrate merely by way of example a suitable embodiment of my invention Fig. 1 is a view in perspective showing especially the rear side with inlet port.

Fig. 2 is a longitudinal vertical section on line 2 2 of Figs. 5 and 6.

Fig. 3 is a longitudinal vertical section on lines 3 3 of Figs. 5 and 6.

Fig. 4 is a longitudinal section on line 4 4 of Figs. 5 and 6.

Fig. 5 is a vertical cross-section on line 5 5 of Figs. 2, 3 and 4.

Fig. 6 is a vertical cross-section on line 6 6 of Figs. 2, 3 and 4.

Similar numerals refer to similar parts throughout the several views.

In accordance with the present embodiment, the chambered body 7 is shown as an integral casting, adapted to be secured in the usual way, to the inner side of a furnace door by means of the lugs or ears 8. The side 9 of the casting, which is adjacent the furnace door, is of double concave formation and thus readily embraces the damper air inlet usually provided in such doors, as shown in my said patent.v In this inner concave formation of wall 9 is provided the air inlet 10. The body 7 is provided with a number of partitions to form a number of passages and channels.

The inlet 10 delivers to passage 11 leading to passage-reservoir 12; this passage-reser- 1924. serial Nb. 716,594.

lower part of`chamberedbody'7. Y Y' From passage-'reservoir r12, a port 13 deliYcrS to l channel 14, ,which extends horizonfv tally and is vertically above passage reservoir 12. From channel 14, port 15 delivers to channel 16 and thence through port 17 to channel 18. Thus far the path of travel has been zigzag, but always in upward direction. From channels 18 port 19 delivers to channel 20. From channel 20, port 21 delivers to channel 22, thence through port 23 to channel 24; the path of travel being in a downward direction, or toward the bottom of the chambered body. From channel 24, port 25 delivers to the channels 26, 27 and 28. These channels 26, 27 and 28 are only partly separated by the partitions 29 and 30, which end short of the end walls of chambered body 7 at eaclrend, so that the flow or passage of air from 25 is distributed simultaneously to the three channels 26, 27 and 28, and thence passes through the delivery or discharge vents 31, into the combustion space.

It will be noted that the air entering inlet 10, flows through the comparatively large passage-reservoir 12, which is in closest proximity to the fuel bed, and is therefore subject to the most intense heat. From this passage-reservoir the air passes upwardly through channels 14, 16 and 18, to the top of body 7, thence downwardly through channels 20, 22 and 24, toward the bottom of the chambered body, and thence it is distributed to and through the three channels 26, 27 and 28, to the delivery or discharge vents 31. This arrangement of channels 26, 27 and 28, with respect to port 25, conforms to the upward tendency of heated air, to secure as even as possible distribution to and sim'ultaneous discharge from all the delivery or discharge vents 31. The forcing of the air downwardly from the top of the chambered body to near the bottom thereof, through the middle group of channels 20, 22 and 24, insures a very thorough heating of the air before delivering to channels 26, 27 andv28, and the delivery to the lowermost of this last group of channels assures a more natural flow and even distribution to the discharge vents 31, as above indicated.

The concave formation of the entire sidev -of the body adjacent the tire-door, adds additional heating space for the air passing from the damper to inlet 10, and also facilitates attaching the device to the door', since it allows more leeway for placing the device and still securing the damper inlet within the' area of 'said concave foi-mation'.

What I claim is An air preheating` device7 comprising a chambered body or' substantially rectangular formation having,` one side thereof of double concave formation, provided in the inner Wall of said formation and near one end of said chambered body,- Witl'i an air inlet port, a passage reservoir extend-ingthroughout the bottom part of said 'chambered body and in communication with said inlet portT means forming ported passages in said chambei'ed body for conducting the air from the passage reservoir first in opposite directions to the top of the body, then in opposite directions toward the bottom of the body, means forming a chamber in the opposite side of the body from the double concave side, the outer Wall of said chamber provided throughout its area with discharge Vents and means for distributing the heated air 25 evenly to said vente'.v

HERBERT n. BRUNNER. 

